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Author
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Topic: 289 question
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gmliebau
Gearhead Posts: 691
From: Port St. Lucie, FL
Registered: Jan 2004
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posted 08-07-2005 11:27 AM
 
I've got an issue with my '65 289. Lemme give you an idea of what I'm running. I've got a stock unmolested 289 with Petronix, an Edelbrock intake and Holley 600cfm carb, stock cam, 2" GT exhaust with resonators, Tri-Y's and Flowmasters.Here's the issue: I've got a weird sputtering noise coming from just the passenger side pipe. I've checked the header and exhaust for leaks, but found none. The plugs are older, but it was doing it with new plugs too. I'm lost as to what the problem could be. My only thought is that it could be the fact that the passenger side tip moves around a little compared to the driver side pipe. In other words, maybe the sound is being manipulated a little with the pipe moving around. Any thoughts?
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kcode
Gearhead Posts: 3415
From: alvaton,ky,usa Suburb of Bowling Green, M&M #79, MCA #29208
Registered: Jun 99
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posted 08-07-2005 12:27 PM
If there is not an "H" pipe involved, you have it isolated to one bank, it could be anything from a weak plug wire or spark to one cylinder to leaking or burnt exhaust valve. A compression test or leakdown test will determine the valve situation.Mike
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gmliebau
Gearhead Posts: 691
From: Port St. Lucie, FL
Registered: Jan 2004
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posted 08-07-2005 03:42 PM
Thanks for the help. There's no H-pipe on the car. I'll check the plugs and wires first. I pulled the cap and rotor off and they look good, so I don't think they're the problem.
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Scott H
Gearhead Posts: 1480
From: Chicago area
Registered: Mar 2005
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posted 08-07-2005 05:25 PM
I think you should search for something that is unique to each cylinder, not common to all. The cap and rotor would be common to all cylinders, whereas a compression test will show what each individual cylinder is doing. I would suspect the beginning of an exhaust valve going south on you, they will tend to puff into the exhaust and once a spot is worn thru it will rapidly advance into a very loud popping sound.
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gmliebau
Gearhead Posts: 691
From: Port St. Lucie, FL
Registered: Jan 2004
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posted 08-07-2005 06:33 PM
Ah shucks. I was really hoping it was just an issue with the exhaust. I'm going to be building a 347 stroker here soon, so I probably won't waste my time fixing this one. I'll just nurse this one for a while.
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